Drawbridge Block

 Everyone loves pistons, and piston doors, they are great, but sometimes you just want to hide away but everyone can kinda guess where your door is because you had to hide it inset into a wall

or perhaps you built a castle but you cant get a working drawbridge without half a tonne of blocks, ruining your design?

a while back i was playing with a Mod (I didn't create it jeez i aint that smart) but there was just that A Drawbridge block, 

Initially it looked like a piston coated in gold and blue, but this is how it worked

Place Drawbridge block

Place 12 blocks of chosen material for the drawbridge

Place 1 block in the "Item lookalike slot" to make the Drawbridge block take the appearance of the block

run redstone

activate

Voila, Drawbridge, big door, wall opening etc

so much easier than a million pistons to make one simple door, or a bridge.

think of it this way, 1 block that holds up to 12 blocks inside of it, that when not activated it looks like a single block of something, and when activated it becomes 12 blocks in a row, forming a bridge, or a door or something